What is provably fair dice on Solana?

Provably fair dice uses commit-reveal hashing so you see SHA-256(serverSeed) before paying SOL, then verify the revealed seed and roll math after payment. Garden Dice on solana.garden is a live wallet-native demo.

How does commit-reveal fairness work?

The server commits to a secret seed by showing its hash first. After you pay, the server reveals the seed. You recompute SHA-256(serverSeed) and the die face from serverSeed plus your client seed (often your tx signature). Any tampering breaks verification.

How much does Garden Dice cost?

Garden Dice rolls cost from 0.001 SOL per roll (up to 0.01 SOL). Payments go directly to an on-chain treasury you can inspect on Solscan. A free demo roll is available without paying.

Is Garden Dice a casino with cash payouts?

No. Garden Dice is pay-per-roll entertainment — you pay for a verifiable on-chain roll and bragging rights, not cash winnings. It is a transparent experiment in wallet-native SOL micropayments.

Do I need extra SOL for network fees?

Yes — keep a little extra beyond the roll. The base Solana network fee is about 0.000005 SOL per transfer.

I have SOL but payment says insufficient — why?

Your total balance can include SOL locked as rent in empty token accounts from spam airdrops. Close them to reclaim about 0.002 SOL each via wallet cleanup or rent reclaim guides on solana.garden.

Provably Fair Dice on Solana — How Commit-Reveal Works

The problem: trust in online rolls

A server could pick the die face after seeing your bet, or skew results in its favor. Traditional online games ask you to trust branding and audits. Commit-reveal schemes let you verify each round with public hashing — the same idea used in blockchain games, casinos, and lotteries.

Commit-reveal in three steps

Commit. The server picks a secret serverSeed and shows you SHA-256(serverSeed) before you send SOL. The server cannot change the seed without changing the hash you already saw.
Pay. You transfer a small amount of SOL from your wallet to the treasury. Your payment transaction signature can become the clientSeed (or you supply your own).
Reveal & verify. The server reveals serverSeed. You recompute the hash and the die face. If anything was tampered with, verification fails.

How Garden Dice computes the roll

After payment confirms, the die face is:

hash = SHA-256(serverSeed + clientSeed)
roll = (first 8 hex chars of hash as integer mod 6) + 1

Same seeds always produce the same face (1–6). You can paste the seeds into any SHA-256 tool and check the math yourself. The commit hash must match SHA-256(serverSeed) from before you paid.

Why Solana fits micropay-per-roll

Sub-cent fees and sub-second finality make “pay 0.001 SOL, get an instant roll” practical. No card processor, no account signup — Phantom, Solflare, Backpack, or Solana Pay QR. Payments go straight to an on-chain treasury you can inspect on Solscan.

Garden Dice is pay-per-roll entertainment, not a casino with cash payouts. You pay for a verifiable roll and bragging rights — a transparent experiment in wallet-native payments.

Network fees are tiny on Solana

A common first-payment worry: “Do I have enough SOL for the fee?” On mainnet the base network fee is about 0.000005 SOL per transfer — far less than the 0.001 SOL roll itself. Keep payment plus fee in your wallet (roughly 0.002 SOL total is safe).

See the Solana transaction fees guide for base vs priority fees, or your first Solana payment for a beginner walkthrough.

Try it yourself

Connect a wallet or use Solana Pay on mobile. Watch the commit hash appear before you pay, then verify the revealed server seed matches.

Pay & roll — 0.001 SOL Free demo above Challenge page

Stuck at payment?

If your wallet says insufficient SOL even though your balance looks fine, part of it may be rent-locked in empty token accounts from spam airdrops — only spendable SOL counts for payments.

Reclaim Solana rent — close empty token accounts and recover about 0.002 SOL each.
Solana wallet cleanup — hide spam tokens, reclaim rent, and check spendable balance.
Solana insufficient SOL — compare Phantom, Solflare, and Backpack balance fixes.
Solana transaction failed — wrong network, cancelled approval, or detection lag.
Solana Pay not working — QR scan, wrong amount, or paid-but-not-detected on mobile.

Full beginner path: wallet tutorial or how to play Solana dice.

FAQ

What is provably fair dice on Solana?: Commit-reveal hashing lets you verify each roll before and after you pay SOL from your wallet. Garden Dice is a minimal live demo at solana.garden/dice.
How much does a roll cost?: From 0.001 SOL per roll plus a ~0.000005 SOL network fee. Try the free demo first — no wallet required.
Is this a casino?: No cash payouts — you pay for a verifiable roll and challenge links, not winnings.
Do I need extra SOL for network fees?: Yes — keep a little extra beyond the roll. See Solana transaction fees for base vs priority fees.
I have SOL but payment says insufficient — why?: Your total balance can include SOL locked as rent in empty token accounts. Close them to reclaim about 0.002 SOL each — wallet cleanup or rent reclaim.

Provably fair dice on Solana